In a world where personalized AI called Hacka Dolls are commonplace, three defective units are deemed unfit for their original purpose.
Instead of being scrapped, they are sent to Earth with a vague mission: to improve humanity.
These Hacka Dolls, despite their flaws and unique quirks, tackle various challenges with boundless energy and a strong sense of morality.
They assist people in unexpected and often comical ways, striving to fulfill their mission one task at a time, even if their methods are unconventional.
The anime follows their chaotic journey as they learn about humanity and try to make a positive impact, however misguided they may be.